This one would be for pumpkin Doug to answer.
But...anyone's advice will be greatly appreciated!
I have dug vine borers out of 2 of my plants and surprisingly they are doing well and growing. However some of the other plants have sporatic yellowing of some of the leaves along with a few of the leaves closest to the hill. They are much greener farther down the vine. No pumpkins yet but plenty of flowers and bees.
I had the same thing with my cantaloupe vines. The local ag extension agent came out to my garden and showed me the little devils were under the leaves just eating away. They didn't touch the watermelon vines in the same area. He said that they don't like watermelon but love squash and cantalope. I used liquid sevin and got most of them out. I will spray again next week to kill the rest of them.
Hope this helps